Description

SCHENCK VLB 20120 Industrial piezoelectric acceleration sensor

Overview

SCHENCK VLB 20120 is a high-performance piezoelectric acceleration sensor produced by Schenck RoTec, a leading vibration technology expert from Germany. This product is specifically designed for vibration monitoring in industrial environments. Its core function is to convert mechanical vibration signals into high-precision electrical signals, thereby enabling continuous monitoring of the status of rotating machinery (such as motors, fans, pumps, gearboxes, etc.) and early fault diagnosis.

As a key front-end sensing component of the Predictive Maintenance system, VLB 20120 helps users detect potential faults such as equipment imbalance, misalignment, bearing damage, and gear meshing issues in advance, effectively avoiding unplanned downtime, ensuring production safety, and extending the service life of equipment.

Core features and advantages

1. Robust and durable industrial-grade design
It features a fully sealed stainless steel casing and robust connectors, offering extremely high mechanical strength and environmental adaptability.

It has excellent anti-electromagnetic interference (EMI) capability and can provide stable and reliable signals in complex industrial electrical environments.

It has excellent moisture-proof, oil-proof and dust-proof performance, and is suitable for all kinds of harsh working conditions.

2. High-performance piezoelectric sensing technology
The core adopts high-quality piezoelectric crystal components, featuring excellent sensitivity and signal-to-noise ratio, and is capable of precisely capturing a wide range of vibrations from low frequencies to high frequencies.

It provides a standard 4-20mA two-wire current output signal. This output method has strong anti-interference ability. The signal can be transmitted over long distances (up to several kilometers), and it is compatible with the vast majority of common PLC, DCS, SCADA systems and condition monitoring instruments, without the need for additional signal conditioning.

3. Integrated Electronic Circuits (IEPE)
The sensor integrates a micro amplifier (IEPE mode, that is, piezoelectric integrated circuit) inside, which directly converts high-impedance charge signals into low-impedance voltage/current signals for output, simplifying system integration and avoiding signal attenuation and noise introduction during long-distance transmission.

VLB20120

4. Broad scope of work and reliability:
◦ Wide temperature range: It can operate stably in a wide range of ambient temperatures from low to high (for example, -40°C to +120°C).

◦ Wide frequency range: It covers the main fault characteristic frequencies from low-speed rotating machinery to high-speed equipment.

Long-term stability: Schenck’s high-quality manufacturing process ensures that the sensor has extremely low drift characteristics, providing long-term, consistent and reliable measurement data and reducing calibration requirements.

5. Multiple installation methods
It offers a variety of flexible installation options, including:

▪ Threaded installation: It is directly and rigorously fixed to the equipment through the screw hole in the center of the base (usually M5 or M8 threads), which is the most recommended way to obtain high-frequency response.

▪ Magnetic base installation (optional) : It is convenient for temporary detection or quick installation in situations where drilling is not possible, but it will limit the maximum available frequency.

▪ Adhesive installation: Suitable for permanent installation scenarios where drilling is not possible.

Typical application fields

VLB 20120 is a universal industrial vibration sensor, widely used in all fields that require continuous online monitoring of the status of rotating machinery:

• Wind power industry: Condition monitoring of generators, gearboxes and main bearings.

• Metallurgical industry: Monitoring of rolling mills, large fans, and pump groups.

• Papermaking industry: Vibration monitoring of the paper machine pressing section and drying drum.

• Chemical and petrochemical industry: Predictive maintenance of compressors, reactors, agitators, and large pumps.

• Hydropower and thermal power: Monitoring of water turbines, turbine generators, coal mills, and feed water pumps.

• General manufacturing industry: Online protection systems for key motors, fans and air compressors on production lines.

Summary of Technical Specifications

• Model: VLB 20120

• Type: Piezoelectric Acceleration Sensor (IEPE)

• Output signal: 4-20mA two-wire system

• Sensitivity: (For example, 100 mV/g. For specific values, please refer to the manual.)

• Measuring range: (For example, ± 50g. For specific values, please refer to the manual.)

• Frequency range: (e.g. 0.5Hz to 10kHz. For specific values, please refer to the manual.)

• Operating temperature: Typically -40°C to +120°C

• Protection grade: Usually IP65 or higher, with excellent dust and water resistance

• Installation thread: Usually M5 x 0.5 or M8 x 1.25

• Supply voltage: Typically 18-30 VDC (standard two-wire loop power supply)

Please contact Sunny sales@xiongbagk.cn for the best price.

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